From Han Wiki
System wouldn't go to sleep
There are many reasons why a computer wouldn't go sleep regardless of the power settings. Here are some of my notes on troubleshooting this.
powercfg -requests yields the following (get into CMD as an Administrator):
C:\Windows\system32>powercfg -requests DISPLAY: None. SYSTEM: [DRIVER] \FileSystem\srvnet An active remote client has recently sent requests to this machine. AWAYMODE: None. EXECUTION: None. PERFBOOST: None.
C:\Windows\system32>powercfg -requestsoverride DRIVER "\FileSystem\srvnet" SYSTEM